SNVA757D August 2017 – September 2020 LP8860-Q1
The LP8860C-Q1 is configured for three strings × 104 mA using a 5-V VDD and PWM pin to control brightness. LED current can be adjusted using an ISET resistor. Table 2-5 lists detailed configurations and full EEPROM information for the LP8860C-Q1.
C | ||
---|---|---|
Boost | Switching Current Limit | 9 A |
SYNC Input | Disabled | |
2 × Charge Pump | Disabled | |
Spread Spectrum | Disabled | |
ƒSW | 2.2 MHz | |
VDD | 3.3 V | |
Initial Boost Voltage | 46 V | |
LED Driver | Input Brightness Control Method | PWM pin input |
Maximum LED Current per Channel | 125 mA | |
ISET Resistor Control | Enabled | |
Number of Channels | 3 strings | |
Channel Phase Shift | 120 degrees (3 phases) | |
LED Output Dimming Method | PWM | |
Current to PWM Switch Point | N/A | |
Current Linearity Correction Slope | N/A | |
Output PWM Dimming Frequency | 4.883 kHz | |
Dimming Resolution | 10-bit PWM + 4-bit dither | |
Drive Strength and Rise Time | 200 ns | |
Dimming Ratio | 1024:1 | |
Sloper | 105 ms + advanced slope | |
Driver Headroom Voltage | VSAT + 50 mV | |
Fault Handling | Short LED Fault Threshold | 10.6 V |
VIN OVP Level | Disabled | |
VIN UVLO Level | 3 V | |
VDD UVLO | 3 V | |
Input OCP Limit | 8 A | |
Powerline FET Type | PMOS | |
SD Pulldown Current | 440 µA | |
Temperature Compensation | Internal Temperature Compensation | Disabled |
External Temperature Compensation | Enabled, current dimming mode | |
Current Dimming Knee Point | 5 µA | |
EXT_TEMP_GAIN[3:0] | 5 | |
EXT_TEMP_LEVEL_HIGH[3:0] | 22.67 kΩ | |
EXT_TEMP_LEVEL_LOW[3:0] | 22.67 kΩ | |
VSYNC and PLL | PLL | Disabled, 5-MHz oscillator |
VSYNC input | Disabled | |
SYNC or HSYNC | N/A | |
PWM_SYNC | N/A | |
Pre-divider | N/A | |
Slow PLL Divider | N/A | |
R_SEL | N/A | |
SEL_Divider | N/A | |
PWM_FREQ | N/A | |
PWM_RES | N/A |
ADDRESS (HEX) | VALUE (BIN) | VALUE (HEX) |
---|---|---|
60 | 01101101 | 6D |
61 | 01011100 | 5C |
62 | 11011100 | DC |
63 | 11110010 | F2 |
64 | 01011111 | 5F |
65 | 11100101 | E5 |
66 | 11111000 | F8 |
67 | 01110111 | 77 |
68 | 01110111 | 77 |
69 | 10110001 | B1 |
6A | 10111111 | BF |
6B | 11111111 | FF |
6C | 00010111 | 17 |
6D | 11101111 | EF |
6E | 10110000 | B0 |
6F | 00000100 | 04 |
70 | 11001110 | CE |
71 | 00000111 | 07 |
72 | 11100101 | E5 |
73 | 11111100 | FC |
74 | 00110101 | 35 |
75 | 10101110 | AE |
76 | 11011100 | DC |
77 | 00110011 | 33 |
78 | 00111111 | 3F |
Figure 2-3 shows the use case for the LP8860C-Q1.